@media only screen and (min-width:750px){
    *{max-width: 750px;margin: 0 auto;}
    html{font-size: 100px}
}
@media only screen and (max-width:750px){
html{font-size: calc(100/750 *100vw)}
}
*{font-family: PingFangSC-Regular; margin:0;padding:0;}
body{margin: 0;background: #f4f4f4;-webkit-tap-highlight-color: rgba(0,0,0,0)}

